patch 8.0.0341: undo does not work properly when using completion commit https://github.com/vim/vim/commit/d56a79d3396cf70861b7f739a3c400db91ce7b70 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 19 15:26:18 2017 +0100 patch 8.0.0341: undo does not work properly when using completion Problem: When using complete() and typing a character undo is saved after the character was inserted. (Shougo) Solution: Save for undo before inserting the character.